Steam-engine.



No. 645,253. Pate'nted Mar. I3, |900.

J. H. FOGABTY. A

STEAM ENGINE.

(Application led Jan. 9, 1899.)

(No Model.)

3 Sheets-Sheet l,

1- 7' zal:

WITN ESSES ATTORNEY Patented Mar. I3; |900. J. H. FOGARTY.

STEAM ENGINE. (Applicaeion ma Jan. 9. i899.)

3 Sheets-Sheet 2,

INVENTOR ATTOBEY WITN ESSES: fz/ w Y' Patented Mar. I3, |900.. J. H. FGAHTY.

STEAM ENGINE.

(Application filed Jan. 9, 1899.)

(No Model.)

3 sheets-sheet 3.

WITNESSES! xNvENToR @7W/@QM BY www.

ATTORNEY UNITED STATES PATENT EEICE.

JAMEsn;roeAETY,or:NEw'YoEK,N.Y.

sTEAM-ENGiNE.

SFECIFICATION forming part of Letters Patent No. 645,253, dated March 13, 1900.

Application filed January 9, 1899. Serial No, 701,543. (No model.) v

To all whom it may concern:

Be it known that I, JAMES H. FOGARTY, of the city and county of New York, in the State of New York, have invented certain new and useful Improvements in Steam or other Engines, of which the following is a specifica-A tion.

This invention relates to the class of reciprocating engines wherein two cylinders are arranged side by side, the pistons thereof moving simultaneously in opposite directions and the piston-rods coupled to cranks in a common crank-shaft.

The object oi' the invention is to produce a simple and inexpensive engine, compact in construction, and one wherein the controlling-valves of the two cylinders are connected or integral and occupy a single steam-chest.

In the accompanying drawings, which illustrate an embodiment of the invention, Figure 1 is a sectional plan of the engine, the plane of the section being indicated by line cc' in Fig. 2. Fig. 2 is a transverse section of the engine in the plane indicated by line co2 in Fig. 1. Fig. 3 is a sectional view of the integral valves detached. Fig. 4. is a vertical longitudinal section of the engine in the plane indicated by line .r4 in Fig. 2 and Fig. 5 is a similar section in the axis of one of the cylinders, as indicated byline m5 in Fig. 2. Fig. 6 is a plan view ot the engine, illustrating another means for operating the valves by one valve-stem. Fig. 7 is a sectional view of the valves detached, showing how they may be connected non-integrally.

Referring, primarily, to Figs. 1 to 5, inclusive, 1 and 1 are the two engine-cylinders, here shown as cast integrally and of the same dimensions. On and formed integrally with the cylinders is a steam-chest 2, common to both cylinders, and 2 is the cover of said chest. In the seat in the chest 2 are formed at one side the induction-ports 3 3 and the exhaust-port 4: of the cylinder 1 and at the other side the induction-ports 3X 3X and exhaust-port 4X of the cylinder 1X. The induction-ports 3 and 3X connect with inductionpassages 5 and 5X, leading to the ends of the respective cylinders, and the two exhaustports connect in common with an exhaust outlet or passage 6 between the upper parts of the cylinders. The live steam enters the steam-chest at a port 7, connected with a steam-passage 3, alined with the exhaustpassage 6 and opening out at the other end of the engine.

The valves which control the induction and exhaust ports are in the nature of a doublepocket slide-valve rocking about a center, the said ports being grouped radially to the center aboutwhich the two connected valves rock. 9 is the valve controlling the parts of cylinder 1, and 9 the valve performing the same duty with cylinder 1X. These are at opposite sides of a central boss 9 and present in plan the appearance seen in the horizontal section Fig. 3, Where they are represented detached, and in Fig. 2, where they are in longitudinal'section in situ.

The valves are operated by an upright arbor 10, which passes out of the valve-chest through a stuffing-box in its cover, Fig. 2, and has a bearing in said cover and at its inner end 10X. Preferably the arbor 10 will have a flattened portion 10, which engages an elongated opening or slot E)b in the boss 9a of the valves, Fig. 3, so that in assembling the parts the connected valves may be placed in the chest, the arbor 10 passed down through the slot 9, and the cover of the valve-chest then put in place, the outer end of the arbor protruding through it. The attened por- ,tion 10a of the arbor compels the valves to move with it when the arbor is rocked. This rocking of the arbor 10 in order t0 impart the proper movements to the valves may be effected by any of the well-known mechanisms common in steam-engines for such purposes. As herein shown, the arbor has secured t0 its outer end a cog-segment 11, which is in gear with a like or similar cog-segment 12, fixed on a shaft 13, mounted rotatively in bearings at right angles to the cylinder-axes. The purpose of the cog-segment is to change the direction of the motion. The shaft 13 may be rocked by an eccentric and rod from the main crank-shaft of the engine or by other similar means well known to engine-builders. It has not been deemed necessary to illustrate this mechanism herein.

It will be noted that the valves 9 and 9X being situated on opposite sides of the rocking ar- IOO Y the stem or arbor 10.

bor 10 move in opposite directions simultaneously, and thus admit steam to the same ends of the respective cylinders alternately.

In Fig. 5, 14X is the piston and l5 the piston-rod. In Fig. l parts of both piston-rods 15 and 15X are shown.

In Fig. 6 another devicev for rocking the connected valves through a single stein or valve-rod is shown. In this case the upright pivot of the valves does not extend through the cover of the valve-chest, but has a bearing therein, and the valves are rocked by a reciprocating stem 10b, which is loosely coupled to or connected with one of the valves at y and passes out of the sidewall of the chest through a stuffing-box 16. This rod may of coursehave an endwise-reciprocating motion imparted to it by the usual means employed for'actuating the slide-valve of a steam-engine.

Fig. shows how the valves 9 and 9X may be cast separately and connected together by Preferably they will lbe cast'in one piece; but the present invention includes as Well two connected valves'operated in unison by one stem orother means.

Having th ns described my invention, I claiml. A double-cylinder engine wherein the pistons move in opposite directions simultaneously, having a single steam-chest common to both cylinders, plane-faced oscillating valves controlling the ports of the respective cylinders said valves beingconnected and operating together andmeans for'irnparting the oscillating movement of said valves substantially as set forth.

2. Adouble-cylinder engine, having a single steam-chest common to both cylinders and suit-able ports and oscillating plane-facedvalves controlling the ports of the respective cylinders, said valves being connected together at a com mon center, a rocking arbor being connected (centrally) to said valves and extending out through the casing of the steam-chest and means for rocking said arbor and through it impart-ing a rocking oscillating movement to the two plane-faced valves simultaneously in opposite directions, substantially as set forth.

3. A double-cylinder engine wherein the pistons move in opposite directions simultaneously,.having a single steam-chest common "to both cylinders, oscillating radial sliding valves controlling the portsof the respective cylinders, said valves being connected and operating together and having their common axis of oscillation at right angles to the faces of the valves, and'rneans for imparting oscillating movement to said valves substantially as set forth. Y

4. A double-cylinder engine having a single steam-chestcom mon to both cylinders and suitable-ports, two radial sliding valves centrally connected and operating together to control the ports of the respective cylinders, said valves having their common axis of oscillation at right angles to their faces, and means for imparting thereto an oscillating movement substantially as shown and described.

5. In a double-cylinder engine, having a single steam-chest, common to both cylinders the connected valves 9 9X grouped radially on two sides of a common center and adapted to swing thereon, and the induction and exhaust ports for the respective cylinders in juxtaposition with said valves, all 'in combination With a reciprocating stem l()b attached to said valves, substantially as and for the purposes shown and described.

6. A double-cylinder engine having a single steam-chest common to-both cylinders,the

induction and exhaust ports for the respective cylinders, grouped radially at the respective'opposite sides, of a rockingarbor l0, the said rocking arbor, mounted in bearings and protruding from the chest, and two valves,9 and 9X, integrally connected through a boss 9, and coupled to said arbor through said boss, substantially as set forth.

V/7. In a double-cylinder engine having a single steam-chest, common to both cylinders, the combination with the connected valves 9 9X having in their common boss the slot 9* to receive the rocking arbor 10, and the said arbor having a journal l0 at its 'inner end and aflattened portion 10a, which engages the slot 9 in the boss of the valves substantially vas set forth.

Y JAMES I-I. FOGARTY. Vitnesses:

PETER A. Ross, A. BELL MALooMsoN. 

